Heating apparatus.



N. M. EDDY.

HEATING APPARATUS.

APPLICATION FILED MAY 5, 1908.

91 7,566. Patented Apr. 6, 1909.

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' HEATING APPARATUS.

Specification of Letters Patent.

Patented April e, 1909.

Application filed May 5, 1908. Serial No. 430,935.

To all whom it may concern:

Be it known that I, NELSON M. EDDY, a citizen of the United States, and a resident of Alpena, in the county of Alpen'a and State of Michigan, have invented a new and I'm proved Heating Apparatus, of which the following is a full, clear, and exact description.

The invention relates to heating apparatus, such as shown and described in the Letters Patent of the United States, No. 782,116, granted to me on February 7, 1905.

The object of the present invention is to provide a new and improved heating apparatus, arranged to return the water of condensation from air piping to the boiler and to render the action entirely automatic, without requiring readjustment of the parts at any time.

The invention consists of novel features and parts and combinations of the'same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a side elevation of the apparatus in a building, the floors of which are shown in section; Fig. 2 is an enlarged sectional side elevation of the return water valve; Fig. 3 is a sectional plan view of the same on the line 3-3 of Fig. 2; and Fig. 4c is an enlarged sectional side elevation of one of the air vents and retarders.

A boiler A of the usual construction is connected by the main steam pipe B with the various radiators or heating coils'C, and the said steam pipe B is provi ed with a return section B for returning the water of condensation to the boiler A frbm the various radiators or heating coils.

Each of the radiators C is provided with an air vent and retarder D, which serves the double function of a vent for allowing air to escape from the radiator-C and of a retarder .to retard the escape of both air and steam from the radiator. The air vent and retarder D is shown in detail in Fig. 4, and consists of a nip le D screwed in a radiator leg and provi ed with a minute opening D? leading to the interior of the radiator leg and connected with a chamber 1) formed in the nipple D and to which access is had by a screw plug D, so that in case the minute opening D becomes clogged up the user can readily clean the opening D on removing the screw plug Di lhe chamber D is connected by a pipe E with a reoei'vingtank F pro vided ontop with an air escape or a vacuum valve G, preferably of the construction inlet compartment 1" into the upper end of which leads the pipe H connected-with the receiving tank F. The lowerend .Of the inlet compartment 1 connects with the lower end of a pipe I arranged within a shell i closed at its lower end to the inlet compartment 1 but connected at its upper end with an outlet compartment 1 from the bottom of which leads the pipe J above referred to. On the top of the pipe I is normally seated a valve K made of rubber or other suit able material and provided with a depending rod K carrying at its lower end a weight K which latter and the rod K extend in the pipe I". Now the water of condensation passing from the receiving tank F into the compartment 1 can rise in thepi'pel and lift the valve K off its seat, to-then'fiow into the shell 1 and outof the same into the compartment 1* and by way ofthe pipe J back to the boiler A. Access-to the valve K can be had by removing a screw plug I as shown in Fig. 2, and from the bottom of the com artment I extends a short pipe I closed y a screw cap 1 which when removed permits of cleaning the compartment 1 of any sediment.

Now by the arrangement described, it will be seen that air in a radiator readily passes out of the same under the slightest pressure and down throughthe air pipe E into the receiving tank F, to escape from the latter by way of the air escape or vacuum valve G. Now should steam reach the retarder D and pass through the same, then the water of condensation of this steam flows by way of the pipe E d'bwninto the receiving tank F and accumulates therein as long as the boiler pressure is above .that of atmoslates in and is held in the receiving tank F as long as the pressure within the boiler is sufiicient to hold it there, but as soon as the boiler pressure is reduced below atmospheric pressure, then the accumulated water in the receiving tank F immediately flows out of the same by way of the pipe H, the return water valve I and the pipe J back to the boiler A.

By constructing a return water valve I in the manner described, it is evident that water can readily flow through the same from the receiving tank F and through the same to the boiler A Whenever the pressure in the boiler is reduced to below atmospheric pressure, but the valve K revents a return flow of the water from the oiler into the tank F the same as the valve G prevents inflow of air into the receiving tank F, but allows outflow of air from the said tank.

It will. be noticed that the air vent and steam retarder D as well as the return water valve 1, are without adjustable features, and consequently the user of the device is not required to readjust any of the parts at any -performed by the retarders D for the radiators, that is it acts as a vent permitting I the air to escape from the return pipe B to the air pipe E.

The boiler A is provided with the usual pressure gage a, and is also provided with the usual damper d and damper regulator c.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a steam heating apparatus, a receiving tank, a pipe line connected with the receiving tank, a radiator, a device connecting the pipe line with the radiator for venting the radiator and retarding the escape of steam therefrom, and a return water valve having an inlet compartment connected with the said receiving tank and provided in its lower end with a normally closed outlet, an outlet compartment connected with the boiler of the heating apparatus, a vertical valve-controlled pipe communicating at its lower end with the said inlet compartment, and a compartment closed at its lower end and in communication at its upper end with the said valve controlled pipe and the said outlet compartment.

2. A steam heating apparatus comprising a boiler, radiators, a main steam pipe connecting the boiler with the said radiators, a receiving tank, a pipe line connected with the receiving tank, devices connecting the radiators with the pipe line for'venting the radiators and'retarding the escape of steam therefrom, an air escape and vacuum valve connected with the said receiving tank, and a return water valve-having an inlet compartment connected by a pipe with the receiving tank, an outlet compartment connected with the boiler, an overflow compare ment communicating with the outlet compartment and valve controlled pipe extending centrally in the said overflow compartment for establishing communication between said inlet and overflow compartments.

3. A steam heating apparatus comprising a boiler, radiators, a main steam pipe connecting the boiler with the said radiators, a receiving tank, devices connected with the radiatorsfor retarding the escape of air and steam therefrom, a pipe line connecting the said devices with the said receiving tank, a return water-valve having an inlet compartment connected with the said receiving tank, an outlet compartment connected with the said boiler, an intermediate compartment, a centralyertical pipe removably secured in said intermediate compartment, the said pipe being in communication at its lower end with the said inlet compartment, and the upper end of the said intermediate compartment being in communication with the said outlet compartment, and a selfseating valve held on the upper end of the said pipe.

4:. In a heating apparatus, a water return valve, comprising an inlet compartment arranged for connection with the return water supply, an outlet com artment arranged for connection with the oiler of the heating apparatus, an intermediate compartment having its bottom provided with a screw threaded opening, a vertical pipe removably secured at its lower end in said opening, the said pipe extending upward into the intermediate compartment and in communication at its lower end with the lower end of the said inlet compartment, the upper end of the said intermediate compartment being in communication with the said outlet compartment, and a self seating valve on the upper end of the said pipe.

5. In a heating apparatus, a whtcr return valve comprising an inletcompartment arranged for connecting with the return water supply, an outlet compartmentarranged for connection with the boiler of the heating apparatus, an intermediate compartment, a

' Vertical pipe extending into the intermediate compartment, and in communication at its lower end with the lower end of the said inlet compartment, the upper end of-the said intermediate compartment being in communication' with the said outlet compartment, a self-seating valve on theupper end of the said pipe, a drip cap connected with the lower end of the said inlet compartment,

and a hollow screw plug for giving access to the said upper end of the said intermediate compartment and valve, the-said plug when in position partially inclosing the said valve.

6. A steam heating apparatus comprising a boiler, radiators, a main steam pipe connecting the boiler with the said radiators, the said pipe being provided with a return section for returning the water of condensation to the boiler, a receiving tank, an air escape and vacuum valve connected with the said receiving tank, devices connected with the radiators for venting the radiators and retarding the escape of steam therefrom, an air pipe connecting the said devices with the said receiving tank, a vent device connecting the return section of the steam pipe with the said air pipe, a return water valve having an inlet compartment connected with the said receiving tank, an outlet compartment connected with the said boiler, an intermediate compartment, a vertical pipe in said intermediate compartment, the said pipe being in communication at its lower end with the said inlet compartment, and the upper end of the said intermediate compartment being in communication with the said outlet compartment, a self seating valve held on the upper end of the said pipe, and a pipe leading from the bottom of t e said inlet compartment and provided with a removable cap.

7. In a heating apparatus, a receiving tank for the Water of'condensation, and a return water valve, comprising an inlet compartment arranged for connection with the receiving tank, an outlet corn artment arranged for connection with the oiler of the heating apparatus, means establishing communication between the inlet and outlet compartments, the said means including a vertical pipe and a valve seated on the upper end of'said pipe, and a hollow plug for giving access to the said valve, the said plug when in position partially inclosing the said valve.

ln testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NELSON MONROE EDDY.

Witnesses ANGUS A. MACDONALD, FLoRENon J. MACDONALD. 

